That's the source of his name -- gorira (gorilla) plus kujira (whale). One version claims "Gojira" was the nickname of a particularly large Toho stagehand or something. In any case, the name was chosen before the creature was designed and doesn't seem to be intended as a literal descriptor of his appearance. He's always been consistently described in the films as a dinosaur; in the original Showa-era continuity he was supposedly a "living fossil" of a hitherto-unknown dinosaurian species, while in the rebooted Heisei-era continuity he was retconned as a radiation-mutated carnosaur. There has always been a certain mammalian/anthropomorphic quality to his design, though.

Still, that's not what the posts you quoted were talking about. We were discussing "man-in-suit" as a function of execution/technique rather than design.

Well, Anguirus is of course an Ankylosaur. Another way of transliterating it is Angilas (angirasu) -- it's basically just "Ankylosaur" in Japanese phonetics and minus the last syllable. Just as Rodan is really Radon, which is short for pteranodon. (They changed the name for the US version because there was some kind of soap or something at the time called Radon. Now we know it better as the name of a toxic element.)

Speculation corner: but was wondering from trailer, why Vegas of all places should be trashed? (San Francisco as Pacific rim city makes sense). Perhaps US had one of the new/unseen kaiju in Area 51, possibly a mutant deterrent to Godzilla. And of course we all know how well that sort of plan pans out . But like I said, idle speculation...